#!/bin/bash
################################################################################
# 02-export-source.sh - Universal Export Script (Auto/Manual)
# Version: 2.1
# Purpose: Export Oracle data with automatic (SSH) or manual modes
################################################################################

set -e

echo "=========================================="
echo "ORACLE EXPORT - UNIVERSAL MODE"
echo "=========================================="
echo ""

# Check required variables from master script
if [ -z "$EXPORT_MODE" ]; then
    echo "ERROR: EXPORT_MODE not set. Run via 00-MASTER-MIGRATION.sh"
    exit 1
fi

# Set default export directory
EXPORT_DIR="${EXPORT_DIR:-/tmp/oracle-export}"

# Export timestamp for filenames
TIMESTAMP=$(date +%Y%m%d_%H%M%S)

################################################################################
# AUTOMATIC EXPORT (via SSH)
################################################################################
if [ "$EXPORT_MODE" = "AUTO" ]; then
    echo "🔄 Mod AUTOMAT - Export via SSH"
    echo ""

    # Validate SSH configuration
    if [ -z "$ORACLE_SOURCE_HOST" ] || [ -z "$ORACLE_SOURCE_USER" ]; then
        echo "ERROR: SSH configuration incomplete"
        echo "  ORACLE_SOURCE_HOST: $ORACLE_SOURCE_HOST"
        echo "  ORACLE_SOURCE_USER: $ORACLE_SOURCE_USER"
        exit 1
    fi

    echo "Source Configuration:"
    echo "  Host: $ORACLE_SOURCE_HOST"
    echo "  User: $ORACLE_SOURCE_USER"
    echo "  OS: $ORACLE_SOURCE_OS"
    echo ""

    # Test SSH connection
    echo "Testing SSH connection..."
    if ! ssh -o ConnectTimeout=5 ${ORACLE_SOURCE_USER}@${ORACLE_SOURCE_HOST} "echo 'SSH OK'" > /dev/null 2>&1; then
        echo "ERROR: Cannot connect via SSH to ${ORACLE_SOURCE_USER}@${ORACLE_SOURCE_HOST}"
        echo "Please check:"
        echo "  1. SSH service is running on source"
        echo "  2. SSH keys are configured (or use ssh-copy-id)"
        echo "  3. Firewall allows SSH connection"
        exit 1
    fi
    echo "✓ SSH connection OK"
    echo ""

    # Execute export based on source OS
    if [ "$ORACLE_SOURCE_OS" = "Windows" ]; then
        echo "Executing Windows export via SSH..."

        # Check if export script exists on Windows
        if ! ssh ${ORACLE_SOURCE_USER}@${ORACLE_SOURCE_HOST} "if exist D:\\oracle-export-scripts\\00-MASTER-EXPORT-WSL.bat (echo EXISTS)" | grep -q "EXISTS"; then
            echo "ERROR: Export script not found on Windows server"
            echo "Expected path: D:\\oracle-export-scripts\\00-MASTER-EXPORT-WSL.bat"
            exit 1
        fi

        # Execute Windows batch script
        echo "Running export on Windows (this may take several minutes)..."
        ssh ${ORACLE_SOURCE_USER}@${ORACLE_SOURCE_HOST} 'cmd /c "D:\oracle-export-scripts\00-MASTER-EXPORT-WSL.bat"'

        # Set remote export path for transfer
        REMOTE_EXPORT_PATH="D:\\oracle-export"

    else
        # Linux/Unix export
        echo "Executing Linux export via SSH..."

        # Check if export script exists
        if ! ssh ${ORACLE_SOURCE_USER}@${ORACLE_SOURCE_HOST} "test -f /tmp/export-scripts/00-MASTER-EXPORT-ALL.sh && echo EXISTS" | grep -q "EXISTS"; then
            echo "ERROR: Export script not found on Linux server"
            echo "Expected path: /tmp/export-scripts/00-MASTER-EXPORT-ALL.sh"
            exit 1
        fi

        # Execute Linux export script
        echo "Running export on Linux (this may take several minutes)..."
        ssh ${ORACLE_SOURCE_USER}@${ORACLE_SOURCE_HOST} "cd /tmp/export-scripts && bash ./00-MASTER-EXPORT-ALL.sh"

        # Set remote export path for transfer
        REMOTE_EXPORT_PATH="/tmp/oracle-export"
    fi

    echo ""
    echo "✓ Export completed on source server"
    echo ""
    echo "Next: Run 03-transfer-to-oracle21c.sh to copy files"

################################################################################
# UPGRADE IN-PLACE (Complete guided workflow)
################################################################################
elif [ "$EXPORT_MODE" = "INPLACE" ]; then
    echo "🎯 Mod UPGRADE IN-PLACE - Ghidare completă"
    echo ""
    echo "=========================================="
    echo "📤 PASUL 1/5: EXPORT DIN ORACLE VECHI"
    echo "=========================================="
    echo ""

    # Detectare unde să execute comenzile
    if [ "$ORACLE_SOURCE_OS" = "Windows" ]; then
        print_warning "⚠️  IMPORTANT: Execută comenzile de mai jos pe WINDOWS (unde e Oracle vechi)"
        echo ""
        echo "Deschide Command Prompt (cmd) CA ADMINISTRATOR și rulează:"
        echo ""
        echo "REM ==================================================="
        echo "REM Export CONTAFIN_ORACLE"
        echo "REM ==================================================="
        echo "cd /d $EXPORT_DIR"
        echo "mkdir %CD% 2>nul"
        echo ""
        echo "exp system/${OLD_ORACLE_PASS}@localhost:${OLD_ORACLE_PORT}/${OLD_ORACLE_SID} ^"
        echo "    FILE=CONTAFIN_ORACLE_%DATE:~-4%%DATE:~3,2%%DATE:~0,2%.dmp ^"
        echo "    OWNER=CONTAFIN_ORACLE ^"
        echo "    LOG=contafin_export.log ^"
        echo "    CONSISTENT=Y"
        echo ""

        if [ -n "$SCHEMA2_NAME" ] && [ "$SCHEMA2_NAME" != "none" ]; then
            echo "REM ==================================================="
            echo "REM Export $SCHEMA2_NAME"
            echo "REM ==================================================="
            echo "exp system/${OLD_ORACLE_PASS}@localhost:${OLD_ORACLE_PORT}/${OLD_ORACLE_SID} ^"
            echo "    FILE=${SCHEMA2_NAME}_%DATE:~-4%%DATE:~3,2%%DATE:~0,2%.dmp ^"
            echo "    OWNER=$SCHEMA2_NAME ^"
            echo "    LOG=${SCHEMA2_NAME,,}_export.log ^"
            echo "    CONSISTENT=Y"
            echo ""
        fi

        echo "REM Verificare fișiere create"
        echo "dir *.dmp"
        echo ""

    else
        # Linux
        print_warning "⚠️  IMPORTANT: Execută comenzile de mai jos pe LINUX (unde e Oracle vechi)"
        echo ""
        echo "Deschide terminal și rulează:"
        echo ""
        echo "# ================================================"
        echo "# Export CONTAFIN_ORACLE"
        echo "# ================================================"
        echo "mkdir -p $EXPORT_DIR"
        echo "cd $EXPORT_DIR"
        echo ""
        echo "exp system/${OLD_ORACLE_PASS}@localhost:${OLD_ORACLE_PORT}/${OLD_ORACLE_SID} \\"
        echo "    FILE=CONTAFIN_ORACLE_\$(date +%Y%m%d).dmp \\"
        echo "    OWNER=CONTAFIN_ORACLE \\"
        echo "    LOG=contafin_export.log \\"
        echo "    CONSISTENT=Y"
        echo ""

        if [ -n "$SCHEMA2_NAME" ] && [ "$SCHEMA2_NAME" != "none" ]; then
            echo "# ================================================"
            echo "# Export $SCHEMA2_NAME"
            echo "# ================================================"
            echo "exp system/${OLD_ORACLE_PASS}@localhost:${OLD_ORACLE_PORT}/${OLD_ORACLE_SID} \\"
            echo "    FILE=${SCHEMA2_NAME}_\$(date +%Y%m%d).dmp \\"
            echo "    OWNER=$SCHEMA2_NAME \\"
            echo "    LOG=${SCHEMA2_NAME,,}_export.log \\"
            echo "    CONSISTENT=Y"
            echo ""
        fi

        echo "# Verificare fișiere create"
        echo "ls -lh *.dmp"
        echo ""
    fi

    echo "=========================================="
    echo ""
    read -p "✅ Apasă ENTER când ai terminat exportul și ai verificat fișierele DMP..." WAIT_EXPORT

    # Verificare existență fișiere (dacă directorul e accesibil)
    if [ -d "$EXPORT_DIR" ]; then
        echo ""
        echo "Verificare fișiere în $EXPORT_DIR..."
        if [ -f "$EXPORT_DIR"/CONTAFIN_ORACLE*.dmp ]; then
            print_success "✅ Fișier CONTAFIN găsit!"
            ls -lh "$EXPORT_DIR"/CONTAFIN_ORACLE*.dmp
        else
            print_warning "⚠️  Nu găsesc fișier CONTAFIN în $EXPORT_DIR"
        fi
    fi

    echo ""
    echo "=========================================="
    echo "⏸️  PASUL 2/5: OPRIRE ORACLE VECHI"
    echo "=========================================="
    echo ""

    if [ "$ORACLE_SOURCE_OS" = "Windows" ]; then
        echo "Pe WINDOWS, deschide Command Prompt CA ADMINISTRATOR și rulează:"
        echo ""
        echo "REM ==================================================="
        echo "REM Oprire servicii Oracle vechi"
        echo "REM ==================================================="
        echo "net stop OracleServiceXE"
        echo "net stop OracleXETNSListener"
        echo ""
        echo "REM Opțional: Dezactivează serviciile (să nu pornească automat)"
        echo "sc config OracleServiceXE start= disabled"
        echo "sc config OracleXETNSListener start= disabled"
        echo ""
        echo "REM Verificare servicii oprite"
        echo "sc query OracleServiceXE"
        echo ""
    else
        echo "Pe LINUX, deschide terminal și rulează:"
        echo ""
        echo "# ==================================================="
        echo "# Oprire servicii Oracle vechi"
        echo "# ==================================================="
        echo "sudo systemctl stop oracle-xe"
        echo "sudo systemctl disable oracle-xe"
        echo ""
        echo "# Verificare serviciu oprit"
        echo "sudo systemctl status oracle-xe"
        echo ""
    fi

    read -p "✅ Apasă ENTER când ai oprit serviciile Oracle vechi..." WAIT_STOP

    echo ""
    print_success "✅ Export complet! Oracle vechi oprit!"
    echo ""
    echo "=========================================="
    echo "📝 PASUL 3/5: INSTALARE ORACLE 21c XE"
    echo "=========================================="
    echo ""
    echo "Următorul pas va fi instalarea Oracle 21c XE."
    echo ""
    echo "Opțiuni:"
    if [ "$ORACLE_SOURCE_OS" = "Windows" ]; then
        echo "  1. Download Oracle XE 21c pentru Windows de la:"
        echo "     https://www.oracle.com/database/technologies/xe-downloads.html"
        echo "  2. Instalare normală (va folosi același port 1521)"
        echo "  3. Apoi continuă cu scripturile de import"
    else
        echo "  1. Instalare cu scriptul 00-install-oracle21c-xe.sh (pentru LXC/Docker)"
        echo "  2. SAU instalare manuală Oracle XE 21c pe Linux"
        echo "  3. Apoi continuă cu scripturile de import"
    fi
    echo ""
    echo "Next: Continuă cu pasul 1 (setup) din master script"

################################################################################
# MANUAL EXPORT (User instructions)
################################################################################
elif [ "$EXPORT_MODE" = "MANUAL" ]; then
    echo "📋 Mod MANUAL - Export ghidat"
    echo ""
    echo "=========================================="
    echo "INSTRUCȚIUNI EXPORT MANUAL"
    echo "=========================================="
    echo ""
    echo "Trebuie să exporți manual următoarele scheme:"
    echo ""
    echo "1. Schema CONTAFIN_ORACLE:"
    echo "   exp user/pass@db FILE=CONTAFIN_ORACLE_${TIMESTAMP}.dmp OWNER=CONTAFIN_ORACLE LOG=contafin_export.log CONSISTENT=Y"
    echo ""

    if [ -n "$SCHEMA2_NAME" ] && [ "$SCHEMA2_NAME" != "none" ]; then
        echo "2. Schema $SCHEMA2_NAME:"
        echo "   exp user/pass@db FILE=${SCHEMA2_NAME}_${TIMESTAMP}.dmp OWNER=$SCHEMA2_NAME LOG=${SCHEMA2_NAME,,}_export.log CONSISTENT=Y"
        echo ""
    fi

    echo "3. SYS Objects (dacă e nevoie):"
    echo "   exp system/pass@db FILE=SYS_OBJECTS_${TIMESTAMP}.dmp OWNER=SYS TABLES=(...) LOG=sys_export.log"
    echo ""
    echo "=========================================="
    echo ""
    echo "După export, copiază fișierele DMP în:"
    echo "  📁 $EXPORT_DIR"
    echo ""
    echo "Apoi continuă cu următorul script."
    echo ""

    read -p "✓ Apasă ENTER când ai terminat exportul și ai copiat fișierele..." WAIT_INPUT

    # Verify exported files exist
    echo ""
    echo "Verificare fișiere exportate..."

    if [ ! -f "$EXPORT_DIR"/CONTAFIN_ORACLE*.dmp ]; then
        echo "❌ ERROR: Nu găsesc fișierul CONTAFIN_ORACLE*.dmp în $EXPORT_DIR"
        echo ""
        echo "Verifică că ai copiat fișierele corect!"
        exit 1
    fi

    if [ -n "$SCHEMA2_NAME" ] && [ "$SCHEMA2_NAME" != "none" ]; then
        if [ ! -f "$EXPORT_DIR/${SCHEMA2_NAME}"*.dmp ]; then
            echo "⚠️  WARNING: Nu găsesc fișierul ${SCHEMA2_NAME}*.dmp"
            read -p "Continui fără schema secundară? (y/n): " CONTINUE
            if [ "$CONTINUE" != "y" ]; then
                exit 1
            fi
        fi
    fi

    echo "✓ Fișiere verificate cu succes"
    echo ""
    echo "Export directory: $EXPORT_DIR"
    ls -lh "$EXPORT_DIR"/*.dmp 2>/dev/null || echo "No DMP files found"

################################################################################
# LOCAL MIGRATION (Same server, different ports)
################################################################################
elif [ "$EXPORT_MODE" = "LOCAL" ]; then
    echo "🏠 Mod LOCAL - Migrare pe același server"
    echo ""

    # Validate local configuration
    if [ -z "$ORACLE_SOURCE_PORT" ] || [ -z "$ORACLE_DEST_PORT" ]; then
        echo "ERROR: Port configuration incomplete for local migration"
        echo "  Source port: $ORACLE_SOURCE_PORT"
        echo "  Dest port: $ORACLE_DEST_PORT"
        exit 1
    fi

    if [ "$ORACLE_SOURCE_PORT" = "$ORACLE_DEST_PORT" ]; then
        echo "ERROR: Source and destination ports must be different!"
        echo "  Both are set to: $ORACLE_SOURCE_PORT"
        exit 1
    fi

    echo "Local Migration Configuration:"
    echo "  Oracle Source: localhost:$ORACLE_SOURCE_PORT/$ORACLE_SOURCE_SID"
    echo "  Oracle Dest: localhost:$ORACLE_DEST_PORT/$ORACLE_DEST_SID"
    echo ""

    # Check if source Oracle is running
    if ! nc -z localhost "$ORACLE_SOURCE_PORT" 2>/dev/null; then
        echo "ERROR: Oracle source not running on port $ORACLE_SOURCE_PORT"
        exit 1
    fi
    echo "✓ Oracle source is running on port $ORACLE_SOURCE_PORT"

    # Check if destination Oracle is running
    if ! nc -z localhost "$ORACLE_DEST_PORT" 2>/dev/null; then
        echo "ERROR: Oracle destination not running on port $ORACLE_DEST_PORT"
        exit 1
    fi
    echo "✓ Oracle destination is running on port $ORACLE_DEST_PORT"
    echo ""

    # Perform local export
    echo "Starting local export..."
    mkdir -p "$EXPORT_DIR"

    # Export CONTAFIN schema
    echo "Exporting CONTAFIN_ORACLE..."
    exp system/${ORACLE_SOURCE_PASS}@localhost:${ORACLE_SOURCE_PORT}/${ORACLE_SOURCE_SID} \
        FILE="${EXPORT_DIR}/CONTAFIN_ORACLE_${TIMESTAMP}.dmp" \
        OWNER=CONTAFIN_ORACLE \
        LOG="${EXPORT_DIR}/contafin_export.log" \
        CONSISTENT=Y

    if [ $? -ne 0 ]; then
        echo "ERROR: CONTAFIN export failed. Check log: ${EXPORT_DIR}/contafin_export.log"
        exit 1
    fi
    echo "✓ CONTAFIN export completed"

    # Export secondary schema if exists
    if [ -n "$SCHEMA2_NAME" ] && [ "$SCHEMA2_NAME" != "none" ]; then
        echo "Exporting $SCHEMA2_NAME..."
        exp system/${ORACLE_SOURCE_PASS}@localhost:${ORACLE_SOURCE_PORT}/${ORACLE_SOURCE_SID} \
            FILE="${EXPORT_DIR}/${SCHEMA2_NAME}_${TIMESTAMP}.dmp" \
            OWNER="$SCHEMA2_NAME" \
            LOG="${EXPORT_DIR}/${SCHEMA2_NAME,,}_export.log" \
            CONSISTENT=Y

        if [ $? -eq 0 ]; then
            echo "✓ $SCHEMA2_NAME export completed"
        else
            echo "⚠️  WARNING: $SCHEMA2_NAME export failed"
        fi
    fi

    echo ""
    echo "✓ Local export completed"
    echo "Files saved to: $EXPORT_DIR"
    ls -lh "$EXPORT_DIR"/*.dmp

else
    echo "ERROR: Invalid EXPORT_MODE: $EXPORT_MODE"
    echo "Valid modes: AUTO, MANUAL, LOCAL"
    exit 1
fi

echo ""
echo "=========================================="
echo "✓ EXPORT PHASE COMPLETED"
echo "=========================================="
echo ""
echo "Exported files location: $EXPORT_DIR"
echo ""
echo "Next step: 03-transfer-to-oracle21c.sh (if needed)"
echo ""